public void init(
CipherParameters param)
{
AsymmetricKeyParameter kParam;
if (typeof(ParametersWithRandom).IsInstanceOfType(param))
{
ParametersWithRandom rParam = (ParametersWithRandom)param;
this.random = rParam.getRandom();
kParam = (AsymmetricKeyParameter)rParam.getParameters();
}
else
{
this.random = new SecureRandom();
kParam = (AsymmetricKeyParameter)param;
}
if (!(typeof(DHPrivateKeyParameters).IsInstanceOfType(kParam)))
{
throw new ArgumentException("DHEngine expects DHPrivateKeyParameters");
}
this.key = (DHPrivateKeyParameters)kParam;
this.dhParams = key.getParameters();
}
public static PrivateKeyInfo createPrivateKeyInfo(AsymmetricKeyParameter key)
{
/*
* Process DH private key.
* The value for L was set to zero implicitly.
* This is the same action as found in JCEDHPrivateKey getEncoded method.
*/
if (key is ElGamalPrivateKeyParameters)
{
ElGamalPrivateKeyParameters _key = (ElGamalPrivateKeyParameters)key;
PrivateKeyInfo info =
new PrivateKeyInfo(
new AlgorithmIdentifier(
OIWObjectIdentifiers.elGamalAlgorithm,
new ElGamalParameter(
_key.getParameters().getP(),
_key.getParameters().getG()).toASN1Object()), new DERInteger(_key.getX()));
return(info);
}
if (key is DSAPrivateKeyParameters)
{
DSAPrivateKeyParameters _key = (DSAPrivateKeyParameters)key;
PrivateKeyInfo info =
new PrivateKeyInfo(
new AlgorithmIdentifier(
X9ObjectIdentifiers.id_dsa,
new DSAParameter(
_key.getParameters().getP(),
_key.getParameters().getQ(),
_key.getParameters().getG()).toASN1Object()), new DERInteger(_key.getX()));
return(info);
}
if (key is DHPrivateKeyParameters)
{
DHPrivateKeyParameters _key = (DHPrivateKeyParameters)key;
PrivateKeyInfo info = new PrivateKeyInfo(
new AlgorithmIdentifier(
PKCSObjectIdentifiers.dhKeyAgreement, new DHParameter(
_key.getParameters().getP(),
_key.getParameters().getG(),
0
).toASN1Object()
)
, new DERInteger(_key.getX()));
return(info);
}
if (key is RSAPrivateCrtKeyParameters)
{
RSAPrivateCrtKeyParameters _key = (RSAPrivateCrtKeyParameters)key;
PrivateKeyInfo info = new PrivateKeyInfo(
new AlgorithmIdentifier(
PKCSObjectIdentifiers.rsaEncryption, new DERNull()),
new RSAPrivateKeyStructure(
_key.getModulus(),
_key.getPublicExponent(),
_key.getExponent(),
_key.getP(),
_key.getQ(),
_key.getDP(),
_key.getDQ(),
_key.getQInv()).toASN1Object());
return(info);
}
if (key is ECPrivateKeyParameters)
{
ECPrivateKeyParameters _key = (ECPrivateKeyParameters)key;
X9ECParameters ecP = new X9ECParameters(
_key.getParameters().getCurve(),
_key.getParameters().getG(),
_key.getParameters().getN(),
_key.getParameters().getH(),
_key.getParameters().getSeed());
X962Parameters x962 = new X962Parameters(ecP);
PrivateKeyInfo info = new PrivateKeyInfo(
new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, x962.toASN1Object()),
new ECPrivateKeyStructure(_key.getD()).toASN1Object());
return(info);
}
throw (new Exception("Class provided is not convertable:" + key.GetType()));
}
